package com.xy.shop.common.utils;

import javax.servlet.http.HttpServletRequest;
import java.net.InetAddress;
import java.net.UnknownHostException;

/**
 * @Description
 * @Author jxp
 **/
public class IpUtil {

    /**
     *
     * @Description 获取客户端真实ip
     * @param request
     * @return
     *
     * @author wjggwm
     * @data 2016年11月21日 下午5:10:22
     */
    public static String getIpAddr(HttpServletRequest request) {
        String ip = request.getHeader("X-Forwarded-For");
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("WL-Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("HTTP_CLIENT_IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("HTTP_X_FORWARDED_FOR");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getRemoteAddr();
        }

        if("127.0.0.1".equals(ip)){
            InetAddress addr=null;
            try {
                addr = InetAddress.getLocalHost();
                ip = addr.getHostAddress().toString();
            } catch (UnknownHostException e) {
                e.printStackTrace();
            }
        }


        //对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割
        if(ip!=null && ip.length()>15){
            if(ip.indexOf(",")>0){
                ip = ip.substring(0,ip.indexOf(","));
            }
        }

        return ip;
    }

}
